National Weather Service on Instagram: "Among the most critical NWS Ocean Prediction Center (OPC) forecasts supporting maritime safety preparedness are OPC’s High Seas and Offshore Waters Forecasts! High Seas Forecasts, issued 4x daily and two days in advance for transoceanic ships, whereas Offshore Waters Forecasts cover ~20–250 nautical miles off the U.S. East and West coasts released 4x per day with wind and wave forecasts 5 days in advance, guiding fishing and coastal vessels and protecting